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Switching ion binding selectivity of thiacalix[4]arene monocrowns at liquid–liquid and 2D-confined interfaces

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dc.contributor.author Muravev A.
dc.contributor.author Yakupov A.
dc.contributor.author Gerasimova T.
dc.contributor.author Nugmanov R.
dc.contributor.author Trushina E.
dc.contributor.author Babaeva O.
dc.contributor.author Nizameeva G.
dc.contributor.author Syakaev V.
dc.contributor.author Katsyuba S.
dc.contributor.author Selektor S.
dc.contributor.author Solovieva S.
dc.contributor.author Antipin I.
dc.date.accessioned 2022-02-09T20:38:34Z
dc.date.available 2022-02-09T20:38:34Z
dc.date.issued 2021
dc.identifier.issn 1661-6596
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/169519
dc.description.abstract Understanding the interaction of ions with organic receptors in confined space is of fundamental importance and could advance nanoelectronics and sensor design. In this work, metal ion complexation of conformationally varied thiacalix[4]monocrowns bearing lower-rim hydroxy (type I), dodecyloxy (type II), or methoxy (type III) fragments was evaluated. At the liquid–liquid interface, alkylated thiacalixcrowns-5(6) selectively extract alkali metal ions according to the induced-fit concept, whereas crown-4 receptors were ineffective due to distortion of the crown-ether cavity, as predicted by quantum-chemical calculations. In type-I ligands, alkali-metal ion extraction by the solvent-accessible crown-ether cavity was prevented, which resulted in competitive Ag+ extraction by sulfide bridges. Surprisingly, amphiphilic type-I/II conjugates moderately extracted other metal ions, which was attributed to calixarene aggregation in salt aqueous phase and supported by dynamic light scattering measurements. Cation–monolayer interactions at the air–water interface were monitored by surface pressure/potential measurements and UV/visible reflection–absorption spectroscopy. Topology-varied selectivity was evidenced, towards Sr2+ (crown-4), K+ (crown-5), and Ag+ (crown-6) in type-I receptors and Na+ (crown-4), Ca2+ (crown-5), and Cs+ (crown-6) in type-II receptors. Nuclear magnetic resonance and electronic absorption spectroscopy revealed exocyclic coordination in type-I ligands and cation–π interactions in type-II ligands.
dc.relation.ispartofseries International Journal of Molecular Sciences
dc.subject Ion bind-ing
dc.subject Langmuir monolayers
dc.subject Liquid-phase extraction
dc.subject Surface potential
dc.subject Thiacalix[4]arene monocrowns
dc.subject UV/visible reflection–absorption spectroscopy
dc.title Switching ion binding selectivity of thiacalix[4]arene monocrowns at liquid–liquid and 2D-confined interfaces
dc.type Article
dc.relation.ispartofseries-issue 7
dc.relation.ispartofseries-volume 22
dc.collection Публикации сотрудников КФУ
dc.source.id SCOPUS16616596-2021-22-7-SID85103118797


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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